Where does “arm” come from?

arm (Middle High German) comes from Old High German arm, from Proto-West Germanic arm, from Proto-Germanic armaz, from Proto-Indo-European h₂ermos, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

Ancestry of “arm”, step by step

StepLanguageWordMeaning
1Old High Germanarmarm; poor, miserable
2Proto-West Germanicarmarm; poor, miserable; pitiful, pitiable
3Proto-Germanicarmazarm; poor, miserable; pitiful, pitiable
4Proto-Indo-Europeanh₂ermos—
5Proto-Indo-Europeanh₂er-to fit, to fix, to put together

Words derived from “arm”

Every word from Proto-Indo-European h₂er- →Every word from Proto-Indo-European h₂ermos →Every word from Proto-Germanic armaz →
arm — Etymology, Origin & Word History | Etymology Explorer